Relief valve



Oct.`25, 1932. H. MULLER RELIEF VALVE Filed Oct. 7, 1950 INVE NTDR WEE:E

Herman Muller- @MEM V .H15 ATTEENEY.

Patented Oct. 25, 1932 HERMAN MLLER, OF PHILADELPHIA, PENNSYLVANIARELIEF VALVE Application, filed October 7, 1930. Serial No. 486,924.

This invention relates to relief valves, and has for an object toprovide a valve of the type embodying new and improved features and newprinciples of operation.

A further object of the invention is to provide in a relief valve, avalve held normally to its seat by a resilient'J diaphragm, with anair-cushion co-operating with said diaphragm for resisting the openingof the in valve.

A further object of the invention is to provide in a relief valve,improved means for facilitating the seating of the valve.

The invention, therefore, comprises a housia ing having a valve seat anda valve co-operating therewith, said valve being connected through themedium of a stem with a diaphragm, with adjusting and locking meanscarried by the stem, and with an air-cushion 2o upon the side of thediaphragm remote from the valve.

The invention is directed to other objects and possesses other featuresof novelty and advantage, some of which, together with the foregoing,will be hereinafter more fully set forth.

In the drawing Figure 1 is a view of the relief valve in plan, seen fromthe point of view of the discharge port,

igure 2 is a transverse sectional view, substantially on a diameter, asindicated by line 2-2 of Figure 1,

Figure 3 is au enlarged detail view of the valve and valve stem, and

Figure 4 is a transverse sectional view taken on line 4*4 of Figure 3.

Like characters of reference indicate corresponding parts throughout theseveral views.

The improved relief valve7 the subject matter of this application,comprises a housing 10 having an inlet connection 11 and an outletconnection 12. These inlet and outlet connections communicate through aninternal chamber 13, the bottom of which is provided with a valve seat14.

A valve 15 is provided with proper contouring to fit the valve seat,here shown as a taper 16, but it is to be understood that the particularform of valve may be varied as circumstances may make desirable, andshowing a taper upon the valve to fit a complementary taper of the seatis intended as no limitation. The valve carries a pilot 17, whichprovides passages 18 thereabout for the discharge of the iuid.

The valve stem is composite, comprising e shank 19, inserted into theaxial bore of the threaded section 20. Both the shank 19 and the section20 are provided with registering openings through which a pin 21 isinserted, the opening through the threaded section being larger thanthat through the shank, such difference in diameter being indicated at22 in Figures 3 and 4. With the pin seated, as shown in the figures, acertain amount of looseness is thereby provided, the shank itself beingsmaller in diameter than the internal bore of the threaded section,providing an annular space 23, so that the valve accommodates itself tovariations, resulting from unequal action of the daphragm, to make acomplete seat.

Lock nuts 24 are provided upon the threaded section 20, which may, asoccasion requires, bear against the top of the valve 15, or against thepin 21, for holding these parts rigid, and for the purposes ofadjustment.

The end of the section 20, abuts against the diaphragm 25 and is held inposition by a rivet, or screw 26. As shown at Figure 2, this diaphragm25 is composed of two thicknesses of resilient material. It is to beunderstood that the number of laminas will be varied according to theresistance to be provided, such diaphragm providing a resistance to theopening of the valve 15.

The diaphragm 25 is held in air-tight relation upon the top of thehousing 10 by means of a cap 27', threaded connection 2S being providedfor accomplishing this air-tight connection. Preferably, a multi-angularpart 29 is provided to receive a wrench, and the cap itself, when inposition, will provide an air chamber, or pocket 30, above the diaphragm25, adding the resistance of prisoned air to the resilient resistance ofthe diaphragm itself.

In operation, of course, the system to be through relieved Will beconnected With the inlet 11 by a pipe in the usual manner, and theconnection 12 may, if found desirable, he also connected With a pipeleading to sewerage, or other Waste.

Water, or other fluid, introduced therefore the inlet 11, into thechamber 13, will hear against the diaphragm 25, and when the pressure ofsuch liquid is great enough to overcome the combined resistance of thediaphragm, the pocket 30, the diaphragm Will lift the valve 15 from itsseat, and the fluid Will flow outwardly through the discharge connection12 to relieve the internal pressure.

As soon as pressure is returned to normal, the resiliency of thediaphragm 25and the air Within the pocket 30 Will again seat the valveand interrupt further discharge.

Of course, the relief valve, herein illustrated, may be modified invarious Ways Without departing from the invention herein set forth andhereinafter claimed, Y Y

The invention is hereby claimed as follows: Y

A relief valve organization comprising a housing, a diaphragm forming achamloery Within the housing, said housing having inlet and outlet portscommuncating with said chamber, a threaded sleeve carried by thediaphragm with a diametrical transecting opening, a valve adapted toclose one portand having a shank loosely inserted Within the sleeve, apin smaller than the opening inserted through said opening and the shankand forming a loose connection, and nuts upon the sleeve adapted toelectively engage the valve and pin and limit the relative movement ofthe valve and sleeve in tWo directions. i

In testimony whereof I have signed my name to this specification.

HERMAN MLLER.

and the aerostatic pressure Within

